Pigment composition for color filter and coloring composition for color filter
A pigment composition and color filter technology, which is applied in the field of color filters and can solve the problems of miniaturization and insufficient dispersion
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manufacture example 1
[0153] Production Example 1
[0154] While stirring 5 kg of 98% sulfuric acid weighed in a stirring vessel at room temperature, 460 g of C.I. Pigment Red 177 ("CROMOPHTAL-RedA2B" manufactured by Ciba Specialty Chemicals Co., Ltd.) shown in Table 1 and 460 g of C.I. In this state, 40 g of the anthraquinone derivative A was stirred at room temperature for 1 hour to completely dissolve it to obtain a sulfuric acid solution. In another stirring container, 25 kg of water and 25 kg of ice were mixed, and the above-mentioned sulfuric acid solution was slowly injected while stirring, to obtain a slurry. The liquid temperature of the slurry after injection was 8°C. The resulting slurry was filtered and washed with water until the pH of the filtrate was 7 or higher. This was dried and pulverized to obtain 465 g of pigment composition A.
manufacture example 2
[0155] Production Example 2
[0156] While stirring 5 kg of 98% sulfuric acid weighed in a stirring vessel at room temperature, 460 g of C.I. Pigment Red 177 ("CROMOPHTAL-RedA2B" manufactured by Ciba Specialty Chemicals Co., Ltd.) shown in Table 1 and 460 g of C.I. In this state, 40 g of the anthraquinone derivative B was stirred at room temperature for 1 hour to completely dissolve it to obtain a sulfuric acid solution. at 3.5kg / cm 2 The above-mentioned sulfuric acid solution was sucked into an aspirator through which water at 5° C. was passed through under a hydraulic pressure, and the pigment composition was precipitated to obtain a slurry. The liquid temperature of the slurry was 50°C. Sodium hydroxide was added to the slurry to adjust the pH to 11 and stirred at 80°C for 1 hour. It was filtered and washed with water until the pH of the filtrate was below 9. Then, it was dried and pulverized to obtain 460 g of pigment composition B.
manufacture example 3～7
[0157] Production Examples 3 to 7
[0158] In Production Example 1, the anthraquinone derivative A was changed to the anthraquinone derivatives C to G shown in Table 2, and the compounding amount was changed as shown in Table 1, except that the operation was the same as in Production Example 1 to prepare a pigment combination Things C~G.
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